Moki Privacy Policy

Last Updated: 2025.12

Overview

Moki ("we", "our", or "the extension") is a Chrome extension that helps users learn languages while watching YouTube videos. This privacy policy explains how we collect, use, and protect your information.

We are committed to data minimization and transparency. We only collect data necessary to provide our core functionality and will never use your data for purposes not described in this policy.

Data Collection Summary

Data Type	Storage Location	Uploaded to Server	Purpose
Email & Password	Server	Yes	Account authentication
Language preferences	Local (Chrome Storage)	No	Personalize your experience
JWT tokens	Local (Chrome Storage)	No	Maintain login session
Subtitle text	Processed in real-time	Yes (not stored)	Translation & analysis
Saved vocabulary	Server	Yes	Your vocabulary collection
Video learning history	Server	Yes	Track your learning progress

Data We Collect

For Registered Users

When you register for a Moki account, we collect:

Email address: Used for account identification and login
Password: Encrypted and securely stored, never stored in plain text
Username (optional): For display purposes only

For All Users (Including Non-Registered)

Local Storage Only (Never Uploaded):

Language preferences (native, target, interface language)
Authentication tokens (for logged-in users)

Note: Users who are not logged in cannot use Moki's translation features. The extension requires an account to access our translation services.

Data Processed But Not Stored

When you use Moki's features, we process the following data in real-time:

YouTube subtitle text (for translation and linguistic analysis)